This simple tool allows you to add the item to the context menu for files in Windows.
Simply select the program you want to use to open different files and type an entry in the RMB menu, which will trigger this action.

The program adds an element in the Windows registry in the branch HKEY_CLASSES_ROOT\*\shell
and of course you can do the same with the standard tool regedit.
However, it is more difficult and less safe.